Electrical Resistivity Tomography

Electrical resistivity tomography (ERT) is a geophysical technique for imaging sub-surface variation of resistivity value from 2D/3D electrical resistivity survey made at surface or borehole. The properties that affect the resistivity of soil or bedrock include porosity, water content, composition (clay mineral and metal content), the salinity of the pore water, and grain size distribution. During resistivity surveys, artificial-ly-generated, near direct current (DC) between current electrodes are injected into the ground and electric potential between two or more pairs of receiver electrodes are measured simultaneously. 2D/3D Inverse modeling is then performed to obtain a sub-surface model of the surveyed site. Therefore, the resistivity tomography survey is ideally suited to investigate the lateral and vertical change of subsurface resistivity and also delineate three-dimensional resistivity anomalies.

Depending on the client's need, SDI uses state of the art multi-channel resistivity equipment to acquire data from depths as great as 300 feet. Finite element inversion processing software is adapted to perform bore, 2D or 3D inversion to produce the best result for any situation. SDI personals have extensive experience in conducting terrestrial and marine resistivity survey for all filed conditions and interpreting data for a variety of applications. We will provide you with an accurate assessment of your requirement to design a survey at a particular site.

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Worldwide Distributors

Specialty Devices Inc.
2905 Capital St.
Wylie Texas 75098

972-429-7240 office

European Distributors

Aquifer Advies bv
Ben ten Toom
Dr. Langeveldplein 6
3361 HE Sliedrecht
0184 – 413147
06 – 24745947

About SDI

For over 30 years, SDI has designed and manufactured bathymetric and sub-bottom survey systems, sediment coring devices, and other specialized survey systems. SDI also provides geospatial, geophysical, hydrographic, sub-bottom, and sediment sampling services.